Program has four different function for each calculator operation do while loop is used to display menu options if else statement is used to check option Program has two variables on which all basic operations are applied Every functions rec

User enters a number which stores in variable num Then number passes as argument in function call A static variable is used to check that how many times function is called When base case becomes true if(statement) then function returns result

In main function user enters input number Calls the function and pass the number Function calculates the required result and return In main function program displays the final result